Molding-machine.



W. 'G. KNBALE, I MOLDING MACHINE; APPLICATION FILED 13110.4. 1907.

Patented Dec; 1, 1908.

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W. G. KNEALE.

- MOLDING MACHINE. Arruoulon FILED 11110.4. 1907.

Patented Dec. 1, 1908.

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WILLIAM G. KNEALE, OF INDIANAPOLIS, INDIANA.

MOLDING-MACHINE.

' Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed December 4, 1907. Serial No. 405,077.

To all whom it may concern:

Be it known that I, WILLIAM C. KNEALE,

a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Molding- 'Machines, of which the following is a specification, reference being had therein to the accompanying drawing. 7

This invention relates to a device where by the mold receiving tables of rock over molding machines or molding machines of this type are rendered automatically ad- 'justable, as hereinafter described in the specification and particularly pointed out in the claims.

In rock-over molding machines, and all machines of that type heretofore in use for flask molding, it has been found in practice that the surfaces of the molding boards used in connection with the molding flasks thereof, warp and twist after a little use,

which is due to the moisture in the sand mold with which they contact, so that, when the molds with their molding boards are turned over upon the mold receiving table, said molding boards are not firmly seated thereupon, but, owing to the warped surfaces of said boards, are unstable and easily tilted or rocked, and the pattern, when being withdrawn from the mold, will. break said mold necessitating the dressing of the same, and ln some cases, Wlll destroy the mold beyond repair.

The object of this invention is to provide a means for automatically adjusting the mold receiving tables of molding machines of the type illustrated to the uneven warped surfaces of the molding boards upon which the sand molds rest and whereby said molding boards are supported to maintain the molds in their relative position to the draft of the mold, so that the sand of the latter will not be broken when withdrawing the patterns therefrom. I attain this object by means of the device illustrated in the ac companying drawings in which like numerals of reference designate like parts throughout the several views.

Figure 1 is a side elevational view of a rock-over molding machine showing my invention of a table equalizing device applied thereto; Fig. 2 is a sectional end elevational view of the same taken along the line 2-2 in Fig. 1; Fig. 3 is a detail enlarged sectional elevational view of said equalizing I device taken along the lines 3-3 in Figs.

2 and 4; Fig. et is a detail front elevational view of said equalizing device; Fig. 5 is a top view of the mold receiving table showing the bearing spottings thereof, and Fig. 6 is an enlarged detail sectional View of the same taken along the line 66 in Figs. 3 and 4.

The type of molding machine to which my invention is particularly adapted is known as a rock-over molding machine, and comprises the supporting standards 1 provided with the forward legs 2 and the rear legs 3. The ends of the forward legs 2 are supported upon the supporting feet 4, and the legs 3 are provided with the bearings 5,in which is journaled the supporting axle 6, and on the projecting ends of the latter are mounted the truck wheels 7 whereon the machine is supported and moved when required.

At or near the top ends of the standards 1 is journaled the-shaft 8 upon which the arms 9 are mounted to swing, so as to transfer the mold from the position shown in full lines to that shown in dotted lines in Fig. l. The molding board 10 is situated on the open top end of the flask 11 to inclose the and 15, situated as shown in Fig. 5, so that any molding board, no matter how warped or' uneven its surface may be, will find or accommodate its surface to a bearing upon said three spottings of said table, and be stable thereupon.

The position of the receiving table 18 relative to the line of the swing of the arms 9 is automatically adjusted and maintained by means of the automatic adjusting device which is the essence of this invention and which I shall now proceed to describe.

This invention of an equalizing device is composed essentially of the ball or sphere 16 and the outer casing 01' socket, composed of the opposing halves l7 and 18, which are adjustably sprung together by the clamping thumb screws 19 and 20 of the clamping lugs 21 and 22. A stud 23 projects from the top flat portion of the ball bearing 16 and a bearing collar 24 is formed integral on said stud which is of a thickness sufficient to provide the proper clearance space between the Cir bottom. of the table to and the top fiat; por- I ll. which is clamped. thereto are now swung l bach 111to the position shown 111 lull lines 111 tion of the ball bearing 1G.

The concave surt'aces ot' the opposing halves of the socket are provided with the recesses 26 into each of which a yielding l'riction producing material 27, as leather, is titted to project slightly beyond the concave inner surfaces of said halves to present i l l 1 yielding friction surfaces to and against:

the spherical surface of the ball. bearing 16.

The bases 28 and 29 are formed integral with the opposing halves 17 and 18 of the socket and said bases are securely bolted. to the s1.1pporting plate 30 which latter is adjuslably secured at. its ends to the top ends ot the vertically extending adjusting studs 31 and Eli. The adjusting studs 31 and 32 lit loosely in the bosses and 3t t'orined integral on the ends of the legs 3, and said studs are adjusted vertically by the screw nuts The steadying pins 36 project from the diametrically opposite sides of the ball hearing 16 to extend into the recesses 37 formed in the opposing halves 17 and 1S, and the same is provided for the purpose of pre venting said ball 1) airing rotating in a horizontal direction in its casing.

I will now proceed to describe the operation ot the device. Suppose the pattern secured to the pattern table 12 and the flask it placed in position on said table to inclose said pattern. The lt10l(lll] sand is now applied and rammed into the flask in the usual manner. The molding board 10 is now placed over and upon the open top end of thc flask it to retain the mold therein when inverting the latter.

The sand mold having been formed and the molding hoard 10 having been applied to the top open end of the flask 11, and secured thereto to retain the mold therein when turning said flask over upon its reverse or open end, is now swungover till the molding board 10 rests upon the receiving table 13. The molding table and the flask Fig. .1, leaving the molding board it) with thoniold resting thereon, upon the receiving table l which latter by means oil? the adjusting incans described will automatically adjust its bcaring spottings to the irregular or warped surlace ot the molding board and maintain the mold in its stable position relative to the pattcrn and the pattern table '19.

l clain1:-

1. in a rockovcr molding machine, the combination with a rcceiving table, bearing 1 spotiings on the top surtacc ot said table,

and a sup 'iorling plate, ot a ball bearing situated centrally nude and secured to said i-'ccciving table, a ball inclosiug casing securcd to said supporting plate and divided 1nto opposing halves, friction bearing pads composed of a yielding material projecting from the interior concave surface of said casing and a casing clan'iping means.

2. In a roclcovcr molding machine, the combination with a receiving table and a supporting plate, ot a ball bearing situated under and secured to said table, a easing into which said ball bearing is fitted resting upon and secured to said supporting plate, and means for prevci'iting a horizontal rotation of said ball bearing in said casing.

3. in a rock over molding machine, the combination with a receiving table and a supporting plate. ot a ball bearing situated under and secured to said table, a easing into which said ball bearing is fitted resting upon and secured to said supporting plate. said casing dividcd into op 'iosing halves. and stop pins projecting lrom the opposing sides of said ball bearing to extend between said opposing halves ot said casing.

in testimony whcreot T have atiixcd my signature in presence o:l two witnesses.

lVlliTilA M KNEA Tilt. ivitnesses Tnonrsox R. BELL, Hnon 1T. BAKER. 

